Valve-port packing.



M. E. CHlVVlS. VALVE'PORT PACKING. APPUCATION man MAR. 24. 1916.

Patented Feb. 13, 1917. 4

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VALVE-PORT PACKING.

Specification of Letters Patent.

Patented'Feb. 13, 1917.

Application filed March 24, 1916. Serial No. 86,339.

21o [tilt 11 L 22? it may concern:

Be it known that 1, MARK E. CHI vvIs, a citizen of the United States, residing at lvianton, in the county of exford, State of Michigan, have invented a new. and useful Valve-Port Packing, of which the following is a specification. I

This invention relates to packing then of internal combustion engines, and consists in the novel features of construction and arrangement of parts as hereinafter set forth and claimed.

The invention has for its object the provision jof simple and efficient means for packing the joints surrounding the valve ports of internal explosive engines, and especially in that type of engine employing rotary or sliding sleeve valves in which the ports are controlled by direct surface contact of the moving valve, so as to secure and constantly maintain a close working yieldable contact between the engaged parts in a manner'to insure a gas-tight seal of the joints and prevent the escape of pressure and the consequent loss of power 1n the engine. In attaining the above object the invention contemplates the employment of a rectangular frame composed of right-angled adjoining triangular corner pieces having their angular extensions overlapping each other diagonally upon opposite ends and sides to'render the frame expansible longitudinally and transversely through the sliding contact afforded between the frame members. This frame is freely seated in a channel or recess formed in the outer face surrounding the port of the valve case and is yield-ably held in surface contact with the inner face of the valve controlling the port by means of a rectangular lcaf-spring which is seated in the recess to flexibly bear against the inner face of the frame and yieldably force it into engagement with said valve so as to form a close working joint and tight sealaround said po 5.

A preferred embodiment of the essential features of the present invention is illustrated in the accompanying drawings, in

which,

Figure l is a sectional view of the headportion'of an engine cylinder showing the packing in position the valve case.

Fig. 2 is a front surrounding the port of elevation of a portion of he valve case with packing in position around the port.

Fig. 3 is a fragmentary horizontal section through the valve port and packing, taken on dotted line 3-3 of Fig. 1.

Fig. 4 is a transverse section through the valve port, valve and packing, taken on dotted line 4-4 of Fig. 2.

Fig. 5 is an elevation of a rectangular sheet metal spring for exerting pressure on the packing frame.

Fig. 6 is a perspective view of two.of the corner sections of the packing frame withdrawn from each other to show the tongue and groove joint connections.

Referring to the parts by the characters of reference marked on the drawings, 1 indicates the head-end portion of an engine cylinder within which is mounted a fixed sleeve or valve case 2 having a port 3 there in, and concentrically interposed between said valve case and the inner wall of the engine cylinder is a rotatable sleeve'valve 4 aving a port 5 adapted to register withthe port of said valve case, as is common in rotary valve engines.

Formed in the outer face of the valve case 2 surrounding the port 3 therein, which is preferably rectangular in form, is a rectangular recess or channel 6 lying adjacent to and embracing the marginal edges 7 of said port. The bottom wall of this channel is formed arcuate to' conform with the arc of the valve case, and seated to bear at its ends and inner edges upon the arcuate bottom, and fitting freely within the side walls of said channel isa flat sheet metal spring frame 8 which bears at opposite ends upon the vertex of the arcuate channel over which the side portions of said spring will be free to flex when subjectedto pressure. (See Fig. 4).

Fitting freely within the channel 6 and I assembled in reversely opposed diagonally thereby.

overlapping relation with each other upon opposite sides and endsof the frame formed (See Fig. 2). The overlapping engaged edges of the angular extensions of the corner pieces are provided with interengaging tongues and grooves 11 and 12 respectively, which serve to retain the members against lateral displacement upon each other and effect a close fitting slidable joint connection bet-Ween the sections to permit the frame to movelatera-lly as a whole within the channel and to render it flexible and that by this arrangement of parts a flexible. and serviceable packing is formed around the valve port which will insure the maintenance of a close, yet free Working joint between the valve case and valve to prevent the gases when passing through the port under pressure from escaping between the valve case and valve.

Having thus fully set forth my invention,

I claim as new and desire to secure by Letters Patent, the following: v 1. In combination with a ported valve case having a channel in the face thereof adjacent to and surrounding the port therein and a valve embracing said valve case for controlling said port, an expansible packing 40 member composed of a series of adjoining diagonally overlapping sections slidably interengaged and movably seated as a whole within said channel, and a flexible member seated in said channel and bearing against said packing member to retain it yieldably engaged with said valve.

2. In combination with a ported valve case having a channel in the face thereof surrounding the port therein and a valve embracing said case for controlling said port, an expansible packing member composed of a plurality of right-angled sections having diagonally overlapping tapering extensions provided with interengaging tongues andgrooves slidably joining and retaining said sections against lateral displacement, thewhole being movably seated within said channehand a leaf-spring flexibly seated in said channel and bearing against said packing member to yieldably retain said member in contact with said valve.

In testimony whereof, I sign this specification.

MARK E. CHIVVIS. 

